常规超声、超声弹性成像和经皮超声造影在乳腺癌前哨淋巴结诊断中的价值比较

目的  探讨常规二维超声、超声弹性成像技术和经皮超声造影（CEUS）对乳腺癌患者同侧腋窝前哨淋巴结的诊断价值。方法  对158例乳腺癌患者进行回顾性分析，术前均行常规二维超声、超声弹性成像、CEUS及粗针穿刺，以病理穿刺结果为金标准，与病理结果一致性进行Kappa检验，以病理诊断前哨淋巴结转移为因变量，以常规二维超声、超声弹性成像和CEUS为自变量，建立Logistic回归模型，并用ROC曲线评价常规二维超声、超声弹性成像和CEUS对乳腺癌前哨淋巴结的诊断价值。结果  经病理诊断共检出206个淋巴结，其中转移性76个，非转移性130个。常规二维超声检查对乳腺癌前哨淋巴结转移的敏感度为69.7%，特异性为94.6%，准确度为85.4%；应用超声弹性成像技术检查的敏感度为84.0%，特异性为96.9%，准确度为92.2%；CEUS检查的敏感度为88.3%，特异性为98.4%，准确度为94.7%；三者联合检查的敏感度为93.4%，特异性为99.2%，准确度为97.1%；与病理结果一致性进行比较，弹性成像、CEUS的一致性均高于常规二维超声，三者联合诊断的一致性最好（Kappa= 0.683、0.828、0.884、0.937，P < 0.05）。ROC曲线显示：常规二维超声、超声弹性成像、CEUS和三者联合诊断乳腺癌前哨淋巴结转移的曲线下面积为0.668、0.712、0.738、0.756。结论  超声弹性成像技术、CEUS对乳腺癌前哨淋巴结的诊断价值均高于常规二维超声，且三者联合诊断的敏感度、特异性、准确性更高，对术前乳腺癌患者同侧转移性前哨淋巴结的诊断具有重要价值。

Value of conventional ultrasound,ultrasound elastography and percutaneous contrast-enhanced ultrasound in sentinel lymph node diagnosis of breast cancer

  Objective  To investigate the diagnostic value of conventional two-dimensional ultrasound, ultrasound elastography and percutaneous contrast ultrasound (CEUS) in ipsilateral axillary sentinel lymph node in breast cancer patients.  Methods  We retrospectively analyzed 158 cases of breast cancer patients. The patients undewent preoperative lines of conventional two-dimensional ultrasound, ultrasound elasticity imaging, CEUS and coarse needle puncture, with pathological biopsy results as the gold standard, and Kappa test for consistency with pathological results. Logistic regression model was established with pathological diagnosis of sentinel lymph node metastasis as dependent variable and routine two-dimensional ultrasound, ultrasound elastography and CEUS as independent variables. ROC curve was used to evaluate the diagnostic value of conventional two-dimensional ultrasound, ultrasound elastography and CEUS in sentinel lymph nodes of breast cancer.  Results  A total of 206 lymph nodes were detected by pathological diagnosis in 158 patients with breast cancer, including 76 metastatic nodes and 130 non-metastatic nodes. The sensitivity, specificity and accuracy of conventional two-dimensional ultrasonography for sentinel lymph node metastasis of breast cancer were 69.7%, 94.6% and 85.4%, respectively. The sensitivity, specificity and accuracy of ultrasound elastography were 84.0%, 96.9% and 92.2%, respectively. The sensitivity, specificity and accuracy of CEUS were 88.3%, 98.4% and 94.7% respectively. The sensitivity, specificity and accuracy were 93.4%, 99.2% and 97.1% respectively. The consistency of elastography and CEUS is higher than that of conventional two-dimensional ultrasound, the consistency of combined diagnosis of the three is the best (Kappa=0.683, 0.828, 0.884, 0.937, P < 0.05). ROC curve showed that the AUC of conventional two-dimensional ultrasound, ultrasound elastic imaging, CEUS and their combination in the diagnosis of sentinel lymph node metastasis of breast cancer were 0.668, 0.712, 0.738 and 0.756.  Conclusion  The diagnostic value of ultrasound elastic imaging and CEUS for sentinel lymph nodes of breast cancer is higher than conventional two-dimensional ultrasound. The combined diagnosis of the three has higher sensitivity, specificity and accuracy, which is of great value for the preoperative diagnosis of ipsilateral metastatic sentinel lymph nodes in breast cancer patients.